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Fabric Water Testing, Quality Assurance

Performance Water Testing 
Performance water testing is focused on the absorption of liquid and its movement on the surface of and/or through a fabric. 
Rain/Water 
The rain/water tests measure resistance to or repellency of water on the surface or through a fabric. 
Rain Test 
The rain test was originally published by A-A-T-C-C in 1947. This standard has been reaffirmed, revised and been in use since it was developed. 
Water Repellency: Spray Test 
The principle of the A-A-T-C-C 22 Water Repellency: Spray Test is to judge the pattern of water spray on the surface of a fabric specimen under controlled conditions using a visual rating scale. 
AATCC Test Methods 
AATCC Test Methods 22 Water Repellency Spray Test and 35 Water Resistance (Rain Test) are the most widely used to set performance specifications for coats and jackets. 
AATCC Tests 
Other tests for water absorbency, repellency, and resistance are standards developed by AATCC. AATCC’s focus for standard test method development is on fabric attributes related to fabric wet-processing and finishing. AATCC does not develop performance specifications for categories of textile end products. ASTM does develop test methods and performance specifications for textile and apparel products. One such test is ASTM D47-72, a water flow test that measures the absorbency of terry fabrics used in towels. 

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